public class PC {
        CPU cpu;
        HardDisk HD;
        public void setCPU(CPU cpu) {
            this.cpu = cpu;
        }
        public void setHardDisk(HardDisk HD) {
            this.HD = HD;
        }
        public void show(){
            System.out.println("CPU的速度为:"+cpu.getSpeed());
            System.out.println("硬盘的容量为:"+HD.getAmount());
        }
}
